
url = "https://www.douban.com"


''' 用 aiohttp 异步爬虫 1s 完成 '''
# import aiohttp
# import asyncio
# import time
# async def get():
#     async with aiohttp.ClientSession(connector=aiohttp.TCPConnector(limit=64,verify_ssl=False)) as session:
#         url = "https://www.douban.com"
#         async with session.get(url) as response:
#             return await response.text()
# async def main():
#     tasks = [get()] * 10
#     results = await asyncio.gather(*tasks)
#     print(results)
# start = time.time() 
# asyncio.run(main())
# print(time.time() - start )


# '''  同步怕虫  5s左右 '''
# import time
# import requests
# start = time.time()
# header = {'User-Agent':'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:103.0) Gecko/20100101 Firefox/103.0'}
# for i in range(10):
#     print(requests.get(url, headers=header).text)
# print('use time: ', time.time() - start )


class Solution:
    def minWindow(self, s: str, t: str) -> str:
        def check(a, b):
            dic = {}
            for i in a:
                dic[i] = 1 if i not in dic else dic[i] + 1
            for i in b:
                if i in dic and dic[i] > 0:
                    dic[i] -= 1
                else:
                    return False
            return True

        length = len(t)
        if length > len(s): return ""
        # if length == len(s) and s !=t: return ""

        for i in range(length, len(s)+1):
            for j in range(len(s)-i+1):
                child = s[j: j+i]
                if check(child, t):
                    return child
        return ""

s = Solution()
a = "obzcopzocynyrsgsarijyxnkpnukkrvzuwdjldxndmnvevpgmxrmvfwkutwekrffnloyqnntbdohyfqndhzyoykiripdzwiojyoznbtogjyfpouuxvumtewmmnqnkadvzrvouqfbbdiqremqzgevkbhyoznacqwbhtrcjwfkzpdstpjswnpiqxjhywjanhdwavajrhwtwzlrqwmombxcaijzevbtcfsdcuovckoalcseaesmhrrizcjgxkbartdtotpsefsrjmvksqyahpijsrppdqpvmuocofuunonybjivbjviyftsyiicbzxnwnrmvlgkzticetyfcvqcbjvbufdxgcmesdqnowzpshuwcseenwjqhgsdlxatamysrohfnixfprdsljyyfhrnnjsagtuihuczilgvtfcjwgdhpbixlzmakebszxbhrdibpoxiwztshwczamwnninzmqrmpsviydkptjzpktksrortapgpxwojofxeasoyvyprjoguhqobehugwdvtzlenrcttuitsiijswpogicjolfxhiscjggzzissfcnxnvgftxvbfzkukqrtalvktdjsodmtgzqtuyaqvvrbuexgwqzwduixzrpnvegddyyywaquxjxrnuzlmyipuqotkghfkpknqinoidifnfyczzonxydtqroazxhjnrxfbmtlqcsfhshjrxwqvblovaouxwempdrrplefnxmwrwfjtebrfnfanvvmtbzjesctdgbsfnpxlwihalyiafincfcwgdfkvhebphtxukwgjgplrntsuchyjjuqozakiglangxkttsczhnswjksnuqwflmumpexxrznzwxurrysaokwxxqkrggytvsgkyfjrewrcvntomnoazmzycjrjrqemimyhriyxgrzcfuqtjhvjtuhwfzhwpljzajitrhryaqchnuawbxhxrpvyqcvhpggrpplhychyulijhkglinibedauhvdydkqszdbzfkzbvhldstocgydnbfjkcnkfxcyyfbzmmyojgzmasccaahpdnzproaxnexnkamwmkmwslksfpwirexxtymkmojztgmfhydvlqtddewjvsrmyqjrpycbmndhupmdqqabiuelacuvxnhxgtpvrtwfgzpcrbhhtikbcqpctlxszgpfbgcsbaaiapmtsucocmpecgixshrrnhyrpalralbccnxvjzjllarqhznzghswqsnfuyywmzbopyjyauknxddgdthlabjqtwxpxwljvoxkpjjpfvccyikbbrpdsyvlxscuoofkecwtnfkvcnzbxkeabtdusyhrqklhaqreupakxkfzxgawqfwsaboszvlshwzhosojjotgyagygguzntrouhiweuomqptfjjqsxlbylhwtpssdlltgubczxslqjgxuqnmpynnlwjgmebrpokxjnbiltvbebyytnnjlcwyzignmhedwqbfdepqakrelrdfesqrumptwwgifmmbepiktxavhuavlfaqxqhreznbvvlakzeoomykkzftthoemqwliednfsqcnbexbimrvkdhllcesrlhhjsspvfupxwdybablotibypmjutclgjurbmhztboqatrdwsomnxnmocvixxvfiqwmednahdqhxjkvcyhpxxdmzzuyyqdjibvmfkmonfxmohhshpkhmntnoplphqyprveyfsmsxjfosmicdsjrieeytpnbhlsziwxnpmgoxneqbnufhfwrjbqcsdfarybzwaplmxckkgclvwqdbpumsmqkswmjwnkuqbicykoisqwoootrdpdvcuiuswfqmrkctsgrevcxnyncmivsxbpbxzxpwchiwtkroqisnmrbmefbmatmdknaklpgpyqlsccgunaibsloyqpnsibwuowebomrmcegejozypjzjunjmeygozcjqbnrpakdermjcckartbcppmbtkhkmmtcngteigjnxxyzaibtdcwutkvpwezisskfaeljmxyjwykwglqlnofhycwuivdbnpintuyhtyqpwaoelgpbuwiuyeqhbvkqlsfgmeoheexbhnhutxvnvfjwlzfmvpcghiowocdsjcvqrdmkcizxnivbianfpsnzabxqecinhgfyjrjlbikrrgsbgfgyxtzzwwpayapfgueroncpxogouyrdgzdfucfrywtywjeefkvtzxlwmrniselyeodysirqflpduvibfdvedgcrzpzrunpadvawfsmmddqzaaahfxlifobffbyzqqbtlcpquedzjvykvarayfldvmkapjcfzfbmhscdwhciecsbdledspgpdtsteuafzbrjuvmsfrajtulwirzagiqjdiehefmfifocadxfuxrpsemavncdxuoaetjkavqicgndjkkfhbvbhjdcygfwcwyhpirrfjziqonbyxhibelinpllxsjzoiifscwzlyjdmwhnuovvugfhvquuleuzmehggdfubpzolgbhwyeqekzccuypaspozwuhbzbdqdtejuniuuyagackubauvriwneeqfhtwkocuipcelcfrcjcymcuktegiikyosumeioatfcxrheklookaqekljtvtdwhxsteajevpjviqzudnjnqbucnfvkybggaybebljwcstmktgnipdyrxbgewqczzkaxmeazpzbjsntltjwlmuclxirwytvxgvxscztryubtjweehapvxrguzzsatozzjytnamfyiitreyxmanhzeqwgpoikcjlokebksgkaqetverjegqgkicsyqcktmwjwakivtsxjwrgakphqincqrxqhzbcnxljzwturmsaklhnvyungjrxaonjqomdnxpnvihmwzphkyuhwqwdboabepmwgyatyrgtboiypxfavbjtrgwswyvcqhzwibpisydtmltbkydhznbsvxktyfxopwkxzbftzknnwipghuoijrbgqnzovxckvojvsqqraffwowfvqvfcmiicwitrhxdeombgesxexedlakitfovtydxunqnwqqdeeekiwjnwoshqcsljiicgobbbuqakjdonjawgjlezdnqhfdqnmsuavxdpnfzwipmspiabveaarshzwxmirgkmfncvtdrdvfxkpxlkdokxgtwcskmjryyymcthfnkasinihaunohkxaibtsqelockaefjmsuolebtnepauwmrxutspjwaxbmahsjtkfkxlnszribmeofbkyvbjscjtqjakuwvcgunvnonvqbbggfshauqsyznokqbhowjusypfnecffenojfvlblgzntqzlrgzprvhqnpfrrkzxznieiuivajivzijsqijigtatifmbplzqahuidegfoobpymkputzamzvweiyvvzlwihgmmmrcburbgbsdxrfjsbiylitghgcpqjbevvgypxcybubyoijijrhuzcdijfybqbfowlookqmlnplbxvjjosfqviygqyhgamuwzjklbyzopkrnhbywtfoqomweldmlrhjqswctubiknzzvcztyehouvnyiqnvkufaobehxhrjvtisxjlxoumipzjarwvbsaegdkpbsjmpevjbewzuqnfhoohhmdjgfpmjzdmtmykqvtucptwfidpwtwffzolffzqfdearclkyeecuzabjeqhxpmfodsvisnpxrqowdawheydfyhoexvcmihdlzavtqlshdhdgjzpozvvackebhgqppvcrvymljfvooauxcjnbejdivikcoaugxwzsulgfqdtefpehbrlhaoqxwcancuvbqutnfbuygoemditeagmcveatgaikwflozgdhkyfqmjcruyyuemwbqwxyyfiwnvlmbovlmccaoguieu"
b = "cjgamyzjwxrgwedhsexosmswogckohesskteksqgrjonnrwhywxqkqmywqjlxnfrayykqotkzhxmbwvzstrcjfchvluvbaobymlrcgbbqaprwlsqglsrqvynitklvzmvlamqipryqjpmwhdcsxtkutyfoiqljfhxftnnjgmbpdplnuphuksoestuckgopnlwiyltezuwdmhsgzzajtrpnkkswsglhrjprxlvwftbtdtacvclotdcepuahcootzfkwqhtydwrgqrilwvbpadvpzwybmowluikmsfkvbebrxletigjjlealczoqnnejvowptikumnokysfjyoskvsxztnqhcwsamopfzablnrxokdxktrwqjvqfjimneenqvdxufahsshiemfofwlyiionrybfchuucxtyctixlpfrbngiltgtbwivujcyrwutwnuajcxwtfowuuefpnzqljnitpgkobfkqzkzdkwwpksjgzqvoplbzzjuqqgetlojnblslhpatjlzkbuathcuilqzdwfyhwkwxvpicgkxrxweaqevziriwhjzdqanmkljfatjifgaccefukavvsfrbqshhswtchfjkausgaukeapanswimbznstubmswqadckewemzbwdbogogcysfxhzreafwxxwczigwpuvqtathgkpkijqiqrzwugtr"
s.minWindow(a, b)